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Overtemperature Fuses from China Suppliers - OT-F & OT-S Types for Electrical Equipment Protection from Factory
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Overtemperature Fuses from China Suppliers - OT-F & OT-S Types for Electrical Equipment Protection from Factory

Overtemperature fuses are essential safety devices designed to safeguard electrical equipment from overheating. These fuses are primarily classified into two categories: the OT-F (one-time fusible temperature fuse) and the OT-S (resettable thermal switch) type. China-based suppliers and manufacturers are increasingly incorporating these fuses in various products due to their reliability and effectiveness.
The OT-F fuse is engineered to permanently disconnect the circuit once the temperature surpasses a predefined threshold. This one-time use feature makes it ideal for applications where only a single failure point is permissible. Once an OT-F fuse has blown, it will need to be replaced to restore functionality, making it a common choice in LED lighting, transformers, electronic components, large household appliances, small household appliances, electric heating devices, and motors.
Conversely, the OT-S fuse functions differently as a resettable thermal switch. It interrupts the circuit when the temperature exceeds a certain limit, but it automatically resets once the temperature returns to a safe level. This convenient feature allows for quick reconnection of the circuit without the need for replacement, making OT-S fuses particularly suitable for applications such as LED lighting, transformers, motors, batteries, hair dryers, heaters, ovens, and chargers. Partnering with reliable China suppliers and factories ensures you get high-quality overtemperature fuses for your needs.

    ZZ3
    Btt Series Thermal Fuse
    Product Description

    When fuse body and its ambience temperature rises to the melting point of the organic compound, the compound changes from solid state to liquid state. Under the action of spring elasticity, the contact is pushed off to cut off the current.

    Product Characteristics
    • Product of organic compound type
    • Temperature band is rich (73–240°C)
    • Accurate action temperature
    • Not recoverable

    ZZ5
    Bta Series Thermal Fuse
    Product Description

    When fuse body and its ambience temperature rises to the melting point of Thermal fuse, the alloy is spherical fused under the surface tension of flux, cutting off the circuit and playing a protective role.

    Product Characteristics
    • Environmentally fusible alloy type
    • Plastic case
    • Accurate action temperature
    • Not recoverable

    ZZ2
    Ksd02 Thermal Protector Series
    Product Description

    Temperature rise: Heat is transferred to bimetallic strip to reach the operating temperature value, and the contacts are disconnected. Temperature drop: Bimetallic strip quickly restored to original state, contact closed and circuit connected.

    Product Characteristics
    • Small size, easy for installing
    • PBT case, metal case, epoxy seal
    • Auto reset bimetallic strip, usage count more than 10,000 times
    • Moistureproof, dustproof, anti soaking paint
    • Superior thermal response, double protection for current & temperature
    • Customized based on customers' requirements

    ZZ4
    Atm Thermal Cut-Out Series
    Product Description

    When the temperature of the protected electrical apparatus rises, the heat generated is transferred to the bimetal sheet element, and when the predetermined operating temperature is reached, the bimetal sheet element acts quickly, pushing the moving contact to disconnect the contact, thereby cutting off the circuit; when the temperature drops to the rated reset temperature, the bimetal sheet element automatically restores the circuit to be connected.

    Product Characteristics
    • Max operation current 16A
    • 100,000 times long life
    • Quick action
    • Superior thermal response
    • Ceramic high temperature resistant bracket
    Frequently Asked Questions
    Q What is the difference between the Btt Series and Bta Series Thermal Fuses?
    The Btt Series uses an organic compound that melts at a specific temperature to break the circuit, while the Bta Series uses an environmentally fusible alloy that becomes spherical under surface tension when melted. Both are non-recoverable, but the Bta Series features a plastic case and is designed as an alloy-type fuse for broader environmental compatibility.
    Q What temperature range does the Btt Series Thermal Fuse cover?
    The Btt Series Thermal Fuse offers a rich temperature band ranging from 73°C to 240°C, making it suitable for a wide variety of thermal protection applications across different industries and devices.
    Q Is the Ksd02 Thermal Protector auto-resettable after it trips?
    Yes. The Ksd02 Thermal Protector Series features an auto-reset bimetallic strip. Once the temperature drops back to a safe level, the bimetallic strip automatically restores to its original state, reconnecting the circuit. It is rated for more than 10,000 operation cycles.
    Q What is the maximum current rating of the Atm Thermal Cut-Out Series?
    The Atm Thermal Cut-Out Series supports a maximum operation current of 16A, and is engineered for a long service life of up to 100,000 operation cycles, with quick action response and a ceramic high-temperature resistant bracket for durability.
    Q Can these thermal protection products be customized for specific requirements?
    Yes. The Ksd02 Thermal Protector Series specifically supports customization based on customer requirements, including different case types (PBT case, metal case, or epoxy seal). For other series, please contact us directly to discuss your specific application needs and temperature specifications.
    Q What types of equipment are these thermal fuses and protectors suitable for?
    These thermal fuses and protectors are suitable for a wide range of electrical and electronic equipment that requires overtemperature protection, including household appliances, motors, transformers, heating elements, and industrial electrical devices. The Ksd02 series also offers moistureproof, dustproof, and anti-soaking paint protection for demanding environments.